boring knife
镗刀
以上为机器翻译结果，长、整句建议使用 人工翻译 。
One day, my carefree get boring, use a knife to scrape a few on the corners of the desk.
一天，我闲得无聊，就用小刀在旮旯的写字台上刮了几下。
youdao
When a back and forth handle on the boring bar is rotated, the boring bar falls back and the pin can quickly dismount the knife.
当转动机床镗杆进退手柄使镗杆向后退时，销子就可快速的把刀具卸下。
应用推荐
模块上移
模块下移
不移动